Battery and bulb tester



June 5, 1923.

1,457,597 0. OHMART BATTERY AND BULB TESTER Filed Sent. 15 1921 2 Sheets-Sheet 1 avwa-wlioz June 5, 1923.

o. OHMART BATTERY AND BULB TESTER Filed Sent. 15 1921 2 Sheets-Sheet 2 vwemoz 0H0 @hmanz Patented June 5, i923.

UHTE

tems? OTTO OI-IMART, OF CAIRO, ILLINOIS.

BATTERY AND BULB TESTER.

Application filed September T all whom it may concern:

Be it known that I, Or'ro OHMART, a citizen of the United States, residing at Cairo, in the county of Alexander and State of Illinois, have invented certain new and useful Improvements in Battery and Bulb Testers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled 1 in the art to'which it appertains to make and use the same.

This invention relates to an improved testing device for testing batteries and bulbs and will be used for testing batteries to ascertain if they have the proper strength and for testing bulbs to see it they are in proper working order.

One object of the invention is to provlde a tester so constructed that cylindrical or flat batteries maybe tested and to further so construct this device that bulbs may be tested by simply placing them upon the base plate of the tester and in engagement with a contact forming part of the tester.

construct this device that a contact strip may be cut from the body of the base plate and after being bent to the proper shape, put in place with a portion of the contact strip plate.

Another object of the invention is to provide an improved means for mounting the contact strip cut from the base plate.

Another object of the invention is to so construct the device that a pair of contacts positioned one above the other may be mounted above and below the base plate and secured by common fasteners, the two contacts being insulated from the base plate.

Another object of'the invention is to so construct this device that the base plate may form the top of a cabinet in which may be mounted a drawer for carrying a stock of bulbs.

This invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a top plan view of the improved tester.

Figure 2-is a side elevation of the structure shown in Fig. 1.

Figure 3 is a longitudinal sectional view taken along the line 3-3 of Fig. 1.

Figure 4c is a sectional view taken along the line 4-4 of Fig. 1.

Figure 5 is a view allowing as a group;

Another object of the invention is to so extending up through the cutout of the base- 15, 1921. Serial No. 500,780.

the contacts and insulating plate shown in Fig. 4. I

Figure 6 is an enlarged sectional view showing a modified form of contact.

Figure 7 is a top plan view showing an arrangement which may be substituted for that shown in Fig. 4.

Figure8 is a sectional view taken along the line 88 of Fig. 7.

This improved tester is used in connection with a cabinet 1 in which will be placed a sliding drawer 2 for carrying bulbs which are to be sold. The base plate 3 of the tester forms the top of the cabinet and is formed from sheet metal cut the proper size. Tongues 4 are struck from' the sheet metal plate 3 and arebent upwardly thus providing contacts for engaging the base ends of cylindrical batteries. If desired, the contacts for engaging the base of the cylindrical battery can be formed from av separate sheet as shown in Fig. 6. This strip or contact 4 is bent intermediate its length to provide a base through which willv pass fastener rivets 5 to connect the contact strip with the base plate. The contact strip 6 for engaging one of the terminals-of a flat battery may be formed by striking a tongue from the plate after the manner of forming the contact strips 4101' may be formed after the manner disclosed in Fig. 6.

A second contact will be provided for cooperating with the contact 6 and with each I of'the contacts 4, and connected with each of the last mentioned contacts which will be indicated in general by the numeral 7 there will be provided a contact plate 8 for use in testing bulbs as will be hereinafter brought out.

In Figs. 4 and 5 there has been shown one-manner of forming and assembling the contacts 7 and 8 and in Figs. 7 and 8 there has been shown a modified manner of forming and assembling these contacts 7 and 8.

Referring to Figs. 4 and 5, it will be'seen that the contact 7 may be formed by stamping a strip 9 from the base plate thus leaving an opening 10 in thebase plate, this opening having one end portion terminating in a circular pocket which may be of the proper size to receive the threaded base of a bulb 11 or may be of the proper size to downwardly extending arms 13 ll(l ll. the upper arm forming a contact strip for engaging the second contact of a hat batte y or for engaging the terminal at the rppcr end of a cylindrical li attcry. ll" for u e in connection with a cylindric iatteiv. toe arm l3 will extend strai P 1 torougn tan base plate. there has been provided an saluting plate l5 and in order to insulate the contact plate 6,- i;- the base plate. there has provi led an insulating plate 16. .l't sror d be noted that the contact plate 8 and the insulating; plates 15 and 16 are wider thar slot 10 so that when the securing rivets re put in place. the slot- 10 will be brido'el and the contacts securely held in place. In order to fill the portion of the slot- 10 between the pocket for carrying the bulb and the ups andinaarm 13. there has been provided a tapered strip 18 which is formed of fibre. This strip 18 fits into the slot and is held in place by the rivets 17 At one end. the fibre strip 18 is cut upon the arc ot a circle but at its other and the strip is cut to provile seat 19 through which the arm 13 will pass. It will thus be seen that the arm 13 will be properly held in place and cannot move transversely to bring its side edges into contacun e; gagement with the base plate. The trip 9 and the contact plate 8 will thus be effectively insulated from the base plate.

the form shown in Figs. and 8. the plate instead of being provided with an elongated slot 10 will be punched to provide an opening :20 and a circular opening 21 and between these openings and 53?. will pro vided with openings 2-. The opening will be of a prop-er size to receive the socket 12 or threaded base of the bulb and the open ing 20 will be of the proper size to perrnit the arm 13 to be easily passed up through the base plate. In this form. the rivets will pass through the openi ,s of the base plate and in order to prevent any danger of contact between the rivets and too has plate. there will be provided insulating sleeves 253 about tncse rivets.

il hen this device is in use. the bulbs to be sold will be kept in the drawer 2 of the cabinet. Bulbs 11 will. be put in place and will have their contacts en the end portion 14iot the contacts 7. l cylinorical battery is t be tested it will be put in place between one 0'? the contacts 4-,

0"} l (1.1(L the cooperating contact '7. From an iuspection of Fig. 1. it will be seen that provision has been made for cylindrical batteries of LE: 1 'i' 157i r lx i G c 1 ll th unree fllilblflo wi h is. he soon as Joe on tery is in place. the circuit will be establishcd from the battery through the Contact to t b tour the bulb to the base vet ery through the il t ius be illiuuinated l' the oro e' stre ll is Xe tested. t y will be positioned vertically with one oil: its lcr1uinals engaging the contact l and its second t ina e1 0 .2 the contact 7 cooperating The bulb co-operatiua' with these contacts will be illuminated it ie battery is of the proper streugytli. but

plate 8 and through the bulb to the base plate 1 and through the contact l back to the battery.

I claim:

1. ll battery and bulb tester comprising a metal base plate, a contact carried there by. a contact secured beneath and insulated from the base plate and having one end portion xtending up through an opening in too base plate, the base plate having a bulb holdi socket in operative relation to the portion. of the second contact below the base plate.v and a contact above and insulated from the has plate and having Operative connection with the second contact.

2. A battery a d bulb tester comprising a metal base plate. a contact carried thereby, a ontact secured beneath and insulated from base plate and having one end portion extending up through an opening in the base 1 late. the base plate having a bulb holding: socket in operative relation to the portion of the second contact below the base plate. and a contact above and insulated from base plate and common means for securing; the second and last mentioned contacts and connecting the for passage of current om one to the other. i

A battery bulb tester comprisinga metal base plate. contact en'endingupwardly from the base plate. the base plate having opening; therein in spaced relation to said contact. a contact positioned be- .eath and insulated from said base plate and having); an extension enitendins up through the opening of: the base plate. and a cont-act above and insulated from the baseplate, the base plate having a laznp socket above and in operative relation to the lower l insulated contact.

4;. A. battery and, bulb tester comprising a metal base plate, a contact extending upwardly from the base plate, the base plate having an opening therein in spaced relation to said contact, a contact strip positioned beneath said base plate and having one end portion bent to extend in spaced relation to the under face of the base plate and its other end portion bent to extent through said opening above the base plate, a contact plate above said base plate, insulating plates between the base plate and contact strip and plate and fastener means passing through the base plate insulation and contacts, the base plate having a lamp socket above the bent lower end portion of said contact strip.

5. A battery and bulb tester comprising a metal base plate having an elongated opening therein, an insulating plate positioned in said opening and terminating in spaced relation to the ends thereof to provide bulb receiving opening and a contact passage, insulating plates above and belowthe base plate bridging said opening, a contact plate upon the upper insulating plate having one side portion extending beyond'the same, a

contact strip against the lower insulating' plate having one end portion extending beneath the bulb receiving opening and its other end portion extending up through the contact passage and through a notch in the end of the first mentioned insulating plate, and fasteners passing through the insulatin plates and upper and lower contacts.

ln testimony whereof I have hereunto set my hand.

OTTO OHMART. 

